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(11)

EP 3 191 885 A1

(12)

(43) Date of publication: 19.07.2017 Bulletin 2017/29 (21) Application number: 16708152.0 (22) Date of filing: 07.03.2016

(51) International Patent Classification (IPC):  G02B 21/00(2006.01) G02B 3/00(2006.01) G02B 21/08(2006.01) G02B 21/36(2006.01) G01N 21/64(2006.01) G02B 21/16(2006.01) (86) International application number: PCT/EP2016/054724 (87) International publication number: WO 2016/146411 (22.09.2016 Gazette 2016/38)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA ME Designated Validation States: MA MD (30) Priority: 19.03.2015 EP 15159793 (71) Applicant: Koninklijke Philips N.V. 5656 AE Eindhoven (NL)	(72) Inventors: BOAMFA, Marius Iosif 5656 AE Eindhoven (NL) WIMBERGER-FRIEDL, Reinhold 5656 AE Eindhoven (NL) HADDEMAN, Theodoor Bastiaan Johannes 5656 AE Eindhoven (NL) (74) Representative: Recoules, Hector  Philips Intellectual Property & Standards High Tech Campus 5 5656 AE Eindhoven 5656 AE Eindhoven (NL)